Magnetic windshield wiper



Jan. 4, 1949. R; R. CHIESA 1 2,457,363

MAGNETIC WINDSHIELD WIPBR V Filed March 2:, 194a 2 Sheets-Sheet 1 INVENTOR. Rober-z E. C/w'esa Patented Jan. 4, 1949 UNITED STATES PATENT OFFICE 2,457,868 MAGNETIC wmnsnrnnn wnum Robert Richard Chiesa, Johnsonburg, Pa. Application March be, 1948, Serial No. 16,532

nets, a cam actuating said arm and being rocked by the wiper shaft for causing the arm to rock the switch element for opening and closing the circuits alternately to the magnets, aspring actuating an eccentric carried by the arm for causing rapid closing of circuits by the switch element;

A further object of the invention is the provision of a windshield wiper which is operated magnetically by a mechanism within a housing formed of insulating materials, said mechanism causing rocking of an arm for actuating a control means for alternately closing circuits which include'a pair of magnets, said magnets acting alternately on an armature attached to the wiper operating shaft for rocking the shaft and the arm, a spring through a predetermined degree. l

The invention will be best understood from a consideration of the following detailed description in view of the accompanying drawing forming part of the specification, nevertheless it is to be understood that the invention is not confined to the disclosure, being susceptible of such changes and modifications which shall define no material departure from the salient features of the invention as expressed in the appended claims. 7

In the drawings:

Figure 1 is a transverse vertical section of my windshield wiper shown applied to an automobile,

Figure 2 is a rear view of the operating mechanism with the housing partly in section,

Figure 3 is a fragmentary vertical section taken along the line 3-3 of Figure 4,

Figure 4 is a vertical section taken along the line 4--4 of Figure 3,

Figure 5 shows more or less diagrammatically an electric circuit, and

Figure 6 is a fragmentary side view of a closure for retaining a brush in an operative position.

Referring more particularly to the drawings Ill designates a windshield over which a wiper II is moved. Said wiper is oscillated by a shaft l2 received by an opening in the front wall of the actuated eccentric causing the arm to be rocked rapidly after the shaft has oscillated said arm automobile and extending transversely of the housing l3 supported on a projection l4. The housing has spaced bearings i5 and it for the shaft.

The housing I3 is preferably manufactured from any well-known plastic not only because of its cheapness but because of its insulating qualities. The housing has a base I! resting on the extension or shelf l4. A compartment 20 is onclosed by a front wall 2| carrying the bearing l5, a rear wall 22 supporting the bearing l5. and

an encircling wall having a semi-circular bottom 23 between the front and rear walls. A smaller compartment 24 projecting from the rear wall a removable cover plate 25.

The inner end of the shaft I2 projects into the compartment 24 and is reduced and threaded as shown at 2B (Figure 3). A shaft 21 formed of Bakelite and screwed onto the threaded end 26 of the shaft l2 has a longitudinal axial passage receiving an axle 28 formed of steel or other conducting materials for a purpose which will be presently explained. A carbon brush 2!! is received by a hollow boss a on the cover 25. A plastic cap 30 fitted into the boss is held in place by a lug 3| on the inner wall of the boss and a bayonet slot 32 formed in the cap (Figure 6). A spring 33 in the cap presses on the brush 28 and also on a contact 34 at the inner end of a wire 35 passin through an opening in the outer end of the cap. The spring maintains the contact in engagement with said brush and the brush in contact with the axle 28.

A brass ring is fitted tightly on the outer end of the Bakelite extension 21 of the shaft i2. A rocking switch member 4| includes a lower end which is rotatably mounted on the ring 40. The upper end of the member 4| has oppositely disposed and outwardly projecting flanges 42 and 43 carrying respectively tungsten contacts 44 and 45. The contact 44 is adapted to engage a contact 46' while the contact 45 is moved into en- Easement with a contact 41. The contacts 46 and 41 are stationary and mounted on projections formed integrally with the walls of the chamber 24.

A rocker arm 50 has its lower end formed integrally with the axle 28 and extends radially upwardly therefrom. A laterally disposed finger 5| moves over a curved surface 52 of the switch member 4! and is adapted to engage alternately the flanges 42 and 43 for oscillating the switch member. The upper end of the arm has a. seat 53 over which projects a protecting flange 54 for a purpose which will be explained presently.

3 An enlargement 55 having the outer face in the form of a sector of a circle provides a pair of inclined faces 55 and 51 (Figure 4).

The outer end of the extension 21 is cut-away horizontal along a diameter to provide oppositely 5 disposed cams 58 and 59. These cams are adapted to engage alternately the inclined faces 56 and 51 respectively for causing the arm 5|! to be rocked.

An eccentric 6i, subetantiallf tnang'elaf 10 shape and having the apices curved is formed of a continuous strip of Bakelite. The reduced ufla per end Bl of the eccentric is receivediwv theseat a 53 for swingably supporting said eccentric. *rntand armature are rocked to the left and the operations r the various members are reversed. At this time, the cam 58 acts on the member 55 lower end 62 of the eccentric balsa wilimduflsal; itlm dhwer end of the actuating arm 50 for lugs 63 centrally located for receiving one end of a coil spring 64 therebetween. "I'heother end" of said spring is secured by a bolt 65 threaded into a boss 66 formed integrally with the bottom of the compartment 24.

i Electromagnets 10 and II are carried by the curved wall of the compartment!!! mhurinontal alignment with the inner ends thereof facing each other for influencing an armature 12 formed of soft iron, secured to and depending from the shaft 12. Said inner ends of the'magnets are sheared oi-i at angles to provide opposed inner ends disposed radially of shafit I12 as showniin Figure 2 so that the armature may engage flatly either inclined .end oi the magnets. The magnets include the usual sott iron core andwindings. A rubber bumper 13 is mounted on a bracket 14 at each side of the cmnpextmentil midis adapted to be engaged bythe armature when said armature swingstoamagnet. The brackets support casings 15 torhousing the magnets. The brackets and casings may be out integrally with the housing l3.

Wires :6 and II (Figures 4 and 5) exists me. i .spectively from the contacts M and 41 to the adjacent ends of the coils o! the respective mnets Hi and H the opposite ends of which are connected by a common lead N to the wound.

The wire 35 is connected with a resistance switch i 80 which is manually operated for varying the speed of the wiper ii. The switch is in circuit with a battery or source of cum ent Ill The ring 40 engages the arm tor supplying current tcthe member II for thecontactsfl and 45..

The operation or my device is as follows: when the switch 80 is closed current will be supplied to one of the magnets since the spring 84 and the eccentric will cause the arm 58 to kick the rockable switch member 41 past dead center for closing one of the pair of contacts 44, 46 and 45, 41 As shown more particularly in Figure 4 itwillbeseenthatthe contaotsfiandfl are in engagement for closing the circuit to the may net Ii. When switch Bil is closed I2 is drawn to said magnet II while rocking the kicking said arm to the right. The shaft [2 is rocked continuously in opposite directions for es the wiper II until the switch is opened.

I [Blue cooperating contacts l4, l6 and 45, 41 form in effect switches. The switches are opened and closed by the rockable member 4|. The member 4i may be formed ot Bahelite or other mon-condmting materials. with wires emtherein running from the brass conduct ing ring 40 to the respective contacts 44 and 45 or the .mcmber M may be formed of conducting materials so that cur-rent will be supplied to ssatti contacts by the member and through the meof the ring to and thearm as What I claim is:

Atlas/lily operatedwindshieid wiper comprising :a-wiper shaft, an Immamm attached to one de fi'nmthe strait, a magnet at cum enda-uf the at rocking monemerrt of the armature, a switch-operating member roclteble on and insulated; from the an eiectriz: circuit, in the circuit and closed in ulternation by the switch operex'ingmember. an em testing-amt rocking on the shaft and insulated theesircm, oppositely disposed flanges on the switch operating member, a; iingermiheaetaisting arm adapted to engage the flanges alter usually for rocking the switch operating member, cooperating means between the shaft and arm for causing sacking of said arm on the shaft, a substantially triangaiariy shapedmember carried ecoentrically by the arm, and a spring connected to the lower end of said member and to a fixed posit for tnppingthe am after said am has been rocked past dead center, the arm and the switch actuating member being in conductive relation with one end of the circuit, either switch completing the circuit.

ROBERT RICHARD CHIESA.

REFERENCES CITED The following references are of record in the meet this patent:

UNITED STATES PSI'EN'I'S Number Name Date 1,568,210 Colstad' Jan. 5, 1926 

